n. 1. the atmosphere and outer space considered together or as a whole. [ WordNet 1.5 ]

2. the sector of industry that designs and builds aircraft, rockets, missiles, and devices or vehicles intended to operate in outer space. [ WordNet 1.5 ]

a. of or pertaining to aerospace in either sense. [ PJC ]

n. 1. the atmosphere above a nation and deemed to be under its jurisdiction. [ WordNet 1.5 ]

. (Billiards) In the balk-line game, any of eight spaces, 7 inches by 31/2, lying along a cushion and bisected transversely by a balk line. Object balls in an anchor space are treated as in balk. [ Webster 1913 Suppl. ]

adv. [ Pref. a- + pace. OE. a pas at a walk, in which a is the article. See Pace. ] With a quick pace; quick; fast; speedily. [ 1913 Webster ]

His dewy locks did drop with brine apace. Spenser. [ 1913 Webster ]

A visible triumph of the gospel draw&unr_; on apace. I. Taylor. [ 1913 Webster ]

v. i. In typing text, to press the backspace key so as to reposition the carriage or cursor on the previous space. [ PJC ]

n. 1. The key on a typewriter or other keyboard used for back spacing.
Syn. -- backspace key. [ WordNet 1.5 ]

n. [ F. ] (Zool.) The thick shell or shield which covers the back of the tortoise, or turtle, the crab, and other crustaceous animals. [ 1913 Webster ]

a. [ L. cepa, caepa, onion. ] Of the nature of an onion, as in odor; alliaceous. [ Webster 1913 Suppl. ]

n. (Baseball) a baseball pitch thrown with little velocity when the batter is expecting a fastball; -- called also change-up.
Syn. -- change-up, change-of-pace ball, off-speed pitch. [ WordNet 1.5 ]

n. [ Cinque + pace. ] A lively dance (called also galliard), the steps of which were regulated by the number five. [ Obs. ] Nares. Shak. [ 1913 Webster ]

adj. 1. completely satisfactory.
Syn. -- copesetic, copesettic. [ WordNet 1.5 ]

You had to be a good judge of what a man was like, and the English was copacetic. John O'Hara

[ After Sir William Crookes, English chemist, who first described it. ] (Physics) The dark space within the negative-pole glow at the cathode of a vacuum tube, observed only when the pressure is low enough to give a striated discharge; -- called also Crookes layer. [ Webster 1913 Suppl. ]

v. i. [ Pref. dis- asunder, different ways, to and fro + pace. ] To roam. [ Obs. ] [ 1913 Webster ]

In this fair plot dispacing to and fro. Spenser. [ 1913 Webster ]

a. [ Cf. F. drupacé. ] (Bot.) Producing, or pertaining to, drupes; having the form of drupes; as, drupaceous trees or fruits. [ 1913 Webster ]

n. Space. [ Obs. ] Chaucer. [ 1913 Webster ]

n. 1. A walking pace or step. [ 1913 Webster ]

2. A dais, or elevated platform; the highest step of the altar; a landing in a staircase. Shipley. [ 1913 Webster ]

a. Moving irregularly; flighty; fickle. [ R. ] Shak. [ 1913 Webster ]

n. (Arch.) A platform of a staircase where the stair turns back in exactly the reverse direction of the lower flight. See Quarterpace. [ 1913 Webster ]

☞ This term and quarterpace are rare or unknown in the United States, platform or landing being used instead. [ 1913 Webster ]

n. (Arch.) See Haut pas. [ 1913 Webster ]

n. A large astromical optical telescope placed into orbit around the earth, from which, in the absence of absorption and distortion by the earth's atmosphere, clear high-resolution images of astronomical objects can be obtained in the visible, infrared, and ultraviolet wavelengths. The telescope was launched into orbit on April 24, 1990. Since then the telescope has taken thousands of images, many of them unique, recording never before seen astronomical phenomena. Service missions were performed in 1993 and 1997, during which astronauts upgraded or replaced equipment on the telescope. Link to Hubble Telescope Information. [ PJC ]

n. [ Pref. hyper- + space. ] (Geom.) A mathematical space having more than three dimensions. It is a mathematical construct and is not intended to represent the structure of the common physical space in which matter exists. [ 1913 Webster +PJC ]

n. [ L. interspatium. See Inter-, and Space. ] Intervening space. Bp. Hacket. [ 1913 Webster ]

a. [ L. lappaceus burlike, fr. lappa a bur. ] (Bot.) Resembling the capitulum of burdock; covered with forked points. [ 1913 Webster ]

prop. n. A natural family of plants, used in some classifications for saprophytic herbs; it is sometimes included in the family Pyrolaceae, and contains the genera Monotropa and Sarcodes.
Syn. -- family Monotropaceae. [ WordNet 1.5 ]

v. t. [ Cf. Outpass. ] 1. To outgo; to move faster than; to leave behind. Lamb. [ 1913 Webster ]

2. To exceed in development or performance; to outdo. [ PJC ]

v. i. [ imp. & p. p. Paced p. pr. & vb. n. Pacing ] 1. To go; to walk; specifically, to move with regular or measured steps. “I paced on slowly.” Pope. “With speed so pace.” Shak. [ 1913 Webster ]

2. To proceed; to pass on. [ Obs. ] [ 1913 Webster ]

Or [ ere ] that I further in this tale pace. Chaucer. [ 1913 Webster ]

3. To move quickly by lifting the legs on the same side together, as a horse; to amble with rapidity; to rack. [ 1913 Webster ]

4. To pass away; to die. [ Obs. ] Chaucer. [ 1913 Webster ]

v. t. 1. To walk over with measured tread; to move slowly over or upon; as, the guard paces his round. “Pacing light the velvet plain.” T. Warton. [ 1913 Webster ]

2. To measure by steps or paces; as, to pace a piece of ground. Often used with out; as, to pace out the distance. [ 1913 Webster +PJC ]

3. To develop, guide, or control the pace or paces of; to teach the pace; to break in. [ 1913 Webster ]

If you can, pace your wisdom
In that good path that I would wish it go. Shak [ 1913 Webster ]

To pace the web (Weaving), to wind up the cloth on the beam, periodically, as it is woven, in a loom. [ 1913 Webster ]

n. [ OE. pas, F. pas, from L. passus a step, pace, orig., a stretching out of the feet in walking; cf. pandere, passum, to spread, stretch; perh. akin to E. patent. Cf. Pas, Pass. ] 1. A single movement from one foot to the other in walking; a step. [ 1913 Webster ]

2. The length of a step in walking or marching, reckoned from the heel of one foot to the heel of the other; -- used as a unit in measuring distances; as, he advanced fifty paces. “The height of sixty pace .” Chaucer. [ 1913 Webster ]

☞ Ordinarily the pace is estimated at two and one half linear feet; but in measuring distances be stepping, the pace is extended to three feet (one yard) or to three and three tenths feet (one fifth of a rod). The regulation marching pace in the English and United States armies is thirty inches for quick time, and thirty-six inches for double time. The Roman pace (passus) was from the heel of one foot to the heel of the same foot when it next touched the ground, five Roman feet. [ 1913 Webster ]

3. Manner of stepping or moving; gait; walk; as, the walk, trot, canter, gallop, and amble are paces of the horse; a swaggering pace; a quick pace. Chaucer. [ 1913 Webster ]

To-morrow, and to-morrow, and to-morrow,
Creeps in this petty pace from day to day. Shak. [ 1913 Webster ]

In the military schools of riding a variety of paces are taught. Walsh. [ 1913 Webster ]

4. A slow gait; a footpace. [ Obs. ] Chucer. [ 1913 Webster ]

5. Specifically, a kind of fast amble; a rack. [ 1913 Webster ]

6. Any single movement, step, or procedure. [ R. ] [ 1913 Webster ]

The first pace necessary for his majesty to make is to fall into confidence with Spain. Sir W. Temple. [ 1913 Webster ]

7. (Arch.) A broad step or platform; any part of a floor slightly raised above the rest, as around an altar, or at the upper end of a hall. [ 1913 Webster ]

8. (Weaving) A device in a loom, to maintain tension on the warp in pacing the web. [ 1913 Webster ]

9. The rate of progress of any process or activity; as, the students ran at a rapid pace; the plants grew at a remarkable pace. [ PJC ]

Geometrical pace, the space from heel to heel between the spot where one foot is set down and that where the same foot is again set down, loosely estimated at five feet, or by some at four feet and two fifths. See Roman pace in the Note under def. 2. [ Obs. ] --
To keep pace with or
To hold pace with, to keep up with; to go as fast as. “In intellect and attainments he kept pace with his age.” Southey. --
To put (someone) through one's paces to cause (someone) to perform an act so as to demonstrate his/her skill or ability. [ 1913 Webster +PJC ]

a. Having, or trained in, [ such ] a pace or gait; trained; -- used in composition; as, slow-paced; a thorough-paced villain. [ 1913 Webster ]

n. (Physiol. & Anat.) 1. a specialized bit of heart tissue that controls the heartbeat.
Syn. -- cardiac pacemaker, sinoatrial node. [ WordNet 1.5 ]

2. An implanted electronic device that takes over the function of the natural cardiac pacemaker{ 1 }; -- used to assist people whose heartbeat is irregular.
Syn. -- artificial pacemaker. [ WordNet 1.5 ]

3. A horse used to set the pace in racing.
Syn. -- pacer, pacesetter. [ WordNet 1.5 ]

n. One who, or that which, paces. [ 1913 Webster ]

2. Especially: A horse trained to a special gait in which both feet on one side leave the ground together; a horse that paces. [ wns=2 ] [ WordNet 1.5 ]

3. A horse used to set the pace in racing. [ wns=3 ]
Syn. -- pacemaker, pacesetter. [ WordNet 1.5 ]

n. A horse used to set the pace in racing.
Syn. -- pacer, pacemaker. [ WordNet 1.5 ]

n. (Arch.) A platform of a staircase where the stair turns at a right angle only. See Halfpace. [ 1913 Webster ]

‖n. pl. [ NL. See Rapacious. ] (Zool.) Same as Accipitres. [ 1913 Webster ]

v. t. To pace again; to walk over again in a contrary direction. [ 1913 Webster ]

a. Slow-moving, like a snail. [ 1913 Webster ]

Bid the snail-paced Ajax arm for shame. Shak. [ 1913 Webster ]

n. [ OE. space, F. espace, from L. spatium space; cf. Gr. spa^n to draw, to tear; perh. akin to E. span. Cf. Expatiate. ] 1. Extension, considered independently of anything which it may contain; that which makes extended objects conceivable and possible. [ 1913 Webster ]

Pure space is capable neither of resistance nor motion. Locke. [ 1913 Webster ]

2. Place, having more or less extension; room. [ 1913 Webster ]

They gave him chase, and hunted him as hare;
Long had he no space to dwell [ in ]. R. of Brunne. [ 1913 Webster ]

While I have time and space. Chaucer. [ 1913 Webster ]

3. A quantity or portion of extension; distance from one thing to another; an interval between any two or more objects; as, the space between two stars or two hills; the sound was heard for the space of a mile. [ 1913 Webster ]

Put a space betwixt drove and drove. Gen. xxxii. 16. [ 1913 Webster ]

4. Quantity of time; an interval between two points of time; duration; time. “Grace God gave him here, this land to keep long space.” R. of brunne. [ 1913 Webster ]

Nine times the space that measures day and night. Milton. [ 1913 Webster ]

God may defer his judgments for a time, and give a people a longer space of repentance. Tillotson. [ 1913 Webster ]

5. A short time; a while. [ R. ] “To stay your deadly strife a space.” Spenser. [ 1913 Webster ]

6. Walk; track; path; course. [ Obs. ] [ 1913 Webster ]

This ilke [ same ] monk let old things pace,
And held after the new world the space. Chaucer. [ 1913 Webster ]

7. (Print.) (a) A small piece of metal cast lower than a face type, so as not to receive the ink in printing, -- used to separate words or letters. (b) The distance or interval between words or letters in the lines, or between lines, as in books, on a computer screen, etc. [ 1913 Webster ]

☞ Spaces are of different thicknesses to enable the compositor to arrange the words at equal distances from each other in the same line. [ 1913 Webster ]

8. (Mus.) One of the intervals, or open places, between the lines of the staff. [ 1913 Webster ]

9. that portion of the universe outside the earth or its atmosphere; -- called also outer space. [ PJC ]

Absolute space,
Euclidian space, etc. See under Absolute, Euclidian, etc. --
deep space, the part of outer space which is beyond the limits of the solar system. --
Space line (Print.), a thin piece of metal used by printers to open the lines of type to a regular distance from each other, and for other purposes; a lead. Hansard. --
Space rule (Print.), a fine, thin, short metal rule of the same height as the type, used in printing short lines in tabular matter. [ 1913 Webster ]

v. i. [ Cf. OF. espacier, L. spatiari. See Space, n. ] To walk; to rove; to roam. [ Obs. ] [ 1913 Webster ]

And loved in forests wild to space. Spenser. [ 1913 Webster ]

v. t. [ imp. & p. p. Spaced p. pr. & vb. n. Spacong ] [ Cf. F. espacer. See Space, n. ] (Print.) To arrange or adjust the spaces in or between; as, to space words, lines, or letters. [ 1913 Webster ]

n. the time during which humans engaged in space exploration; -- generally considered as beginning on October 4, 1957 when the Soviet Union placed the first artificial satellite into orbit around the earth. [ PJC ]

n. a person who appears disconnected from reality, or living in his own world; -- sometimes used of people who are under the influence of mind-altering drugs. [ derogatory ] [ PJC ]

n. a vehicle capable of travelling in or into outer space; at present, all such vehicles are powered by rocket engine. [ PJC ]

n. the process or event in which vehicles travel into outer space. [ PJC ]

a. Wide; extensive. Sandys. [ 1913 Webster ]

n. a portable heating device used for warming the air of a single room; -- it may be electrical or use a combustible fuel. [ PJC ]

{ or }. (Mach., Computers) A bar or key, in a typewriter, typesetting machine, or other keyboard (as a computer keyboard), used to insert a space between letters. [ Webster 1913 Suppl. +PJC ]

a. Without space. Coleridge. [ 1913 Webster ]

n. 1. an astronaut. [ PJC ]

2. an intelligent creature from outer space; an extraterrestrial; -- a fictional or hypothetical being, never actually observed. [ PJC ]

n. [ by analogy with airport. ] a facility where vehicles are launched into space. [ PJC ]